Inelastic proton scattering from 42Ca and 44Ca and analysis in terms of shell-model form factors

doi:10.1016/0375-9474(68)90393-X

Nuclear Physics A

Volume 116, Issue 3, 19 August 1968, Pages 580-608

https://doi.org/10.1016/0375-9474(68)90393-X Get rights and content

Abstract

Inelastic proton scattering measurements have been carried out at 22.9 MeV from ⁴²Ca and ⁴⁴Ca. Angular distributions have been measured for 11 inelastic proton groups from ⁴²Ca and eight from ⁴⁴Ca. The experimental differential cross sections have been compared with distorted wave calculations using a collective-model interaction in which both the real and imaginary terms of the optical potential were deformed. Extensive comparisons are performed with distorted wave calculations using a shell-model description for the nuclear states as well as more complicated wave functions with a collective component. An empirical core polarization correction is used. The analysis is shown to be consistent with ⁵⁰Ti scattering data.

References (39)

G.R. Satchler
Nucl. Phys.
(1967)
M.M. Stautberg et al.
Nucl. Phys.
(1967)
J.H. Bjerregaard et al.
Nucl. Phys.
(1967)
D.A. Lind et al.
Nucl. Instr.
(1962)
J.J. Kraushaar et al.
Phys. Lett.
(1967)
G.R. Satchler
Nucl. Phys.
(1967)
P.M. Endt et al.
Nucl. Phys.
(1962)
W.G. Love et al.
Nucl. Phys.
(1967)
W.J. Gerace et al.
Nucl. Phys.
(1967)
P. Federman
Phys. Lett.
(1966)

B.F. Bayman et al.

Nucl. Phys.

(1966)

P.H. Stelson et al.

Nucl. Data

(1965)

L.W. Owen et al.

Nucl. Phys.

(1964)

W.S. Gray et al.

Phys. Rev.

(1966)

M.M. Stautberg et al.

Phys. Rev.

(1966)

M.M. Stautberg et al.

Phys. Rev.

(1967)

W.S. Gray et al.

Nucl. Phys.

(1955)

R.J. Peterson

E.P. Lippincott

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Nuclear Structure and Decay Data for A=44 Isobars
2023, Nuclear Data Sheets
Experimental nuclear spectroscopic data are evaluated for 12 known nuclides of mass number A=44 (Si, P, S, Cl, Ar, K, Ca, Sc, Ti, V, Cr, Mn). Detailed evaluated information are presented for each reaction and decay. Recommended values combining all available data are provided for all spectroscopic properties of each level, γ-ray, and decay radiation. No excited states have yet been identified in ⁴⁴Si, ⁴⁴P, ⁴⁴Cr, and ⁴⁴Mn. Information for excited states in ⁴⁴Cl and ⁴⁴V are limited. Nuclides of ⁴⁴S, ⁴⁴Ar and ⁴⁴K have been studied via only a few reactions and decays, while ⁴⁴Ca, ⁴⁴Sc and ⁴⁴Ti are the most investigated nuclides through various reactions and decays. Evaluators note that the half-life of the g.s. of ⁴⁴S has been measured independently, with fairly good statistics, in three references, most precise being 100 ms 1 by 2004Gr20, but this value is in disagreement with the values of 125.5 ms 25 and 119 ms 6 by 2022Tr03, and 123 ms 10 by 1995So03. We adopted the unweighted average of this discrepant dataset. Another outstanding issue is that of the β⁺-delayed proton decay of ⁴⁴Cr g.s. to ⁴⁴V, where the T=2, 0⁺ IAS state in ⁴⁴V is expected to be strongly populated by a superallowed β transition, but has not been definitely identified as discussed in detail by 2020Fu05. A detailed study of ⁴⁴Cr decay is required to unravel the status of the T=2, 0⁺ IAS state in ⁴⁴V. This work supersedes earlier ENSDF evaluations of A=44 by 2011Ch39 and 1999Ca45.
Nuclear Data Sheets for A = 42
2016, Nuclear Data Sheets
The experimental data are evaluated for known nuclides of mass number A = 42 (Al, Si, P, S, Cl, Ar, K, Ca, Sc, Ti, V, Cr). Detailed evaluated level properties and related information are presented, including adopted values of level and γ–ray energies, decay data (energies, intensities and placement of radiations), and other spectroscopic data. This work supersedes earlier full evaluations of A = 42 published by B. Singh, J.A. Cameron – Nucl.Data Sheets 92, 1 (2001) and P.M. Endt – Nucl. Phys. A521, 1 (1990); Errata and Addenda Nucl. Phys. A529, 763 (1991); Errata Nucl. Phys. A564, 609 (1993) (also P.M. Endt – Nucl. Phys. A633, 1 (1998) update).
No excited states are known in ⁴²Al, ⁴²P, ⁴²V and ⁴²Cr, and structure information for ⁴²Si and ⁴²S is quite limited. There are no decay schemes available for the decay of ⁴²Al, ⁴²Si, ⁴²P, ⁴²V and ⁴²Cr, while the decay schemes of ⁴²Cl and ⁴²Ti are incomplete in view of scarcity of data, and large gap between their Q–values and the highest energy levels populated in corresponding daughter nuclei. Structures of ⁴²Ca, ⁴²K, ⁴²Sc and ⁴²Ar nuclides remain the most extensively studied via many different nuclear reactions and decays.
Nuclear Data Sheets for A = 44
2011, Nuclear Data Sheets
The experimental data are evaluated for known nuclides of mass number A=44 (Si,P,S,Cl,Ar,K,Ca,Sc,Ti,V, Cr,Mn). Detailed evaluated level properties and related information are presented, including adopted values of level and γ-ray energies, decay data (energies, intensities and placement of radiations), and other spectroscopic data. This work supersedes earlier full evaluations of A=44 published by 1999Ca45 and 1990En08 (also 1998En04 update).
No excited states are known in ⁴⁴Si, ⁴⁴P, ⁴⁴Cr, ⁴⁴Mn. Only one excited state is known in 44V and its Isobaric Analog State (IAS) has been observed but with the level energy not known. Information for ⁴⁴S, ⁴⁴Cl and ⁴⁴Ar is limited and their radioactive decay schemes seem incomplete in view of large Q values and known excitations much below than allowed by Q values. The ⁴⁴Ca, ⁴⁴Sc and ⁴⁴Ti nuclides remain as the most extensively studied from many different reactions and decays.
Calculation and analysis of p + 40,42,43,44,46,48,natCa reaction cross sections at incident energies from threshold to 250 MeV
2011, Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Citation Excerpt :
The calculated results of elastic scattering angular distributions at the incident proton energies of 9.0, 12.0, 21.0, 25.0, 30.0, 35.0, 40.0, 45.0 and 48.4 MeV, and elastic scattering angular distributions in the Rutherford ratio at the incident proton energies of 22.85, 49.35 and 65.0 MeV are in good agreement with experimental data [47,60,62–64] for p + 42Ca reaction as shown in Figs. 9 and 10. The calculated results of elastic scattering angular distributions at the incident proton energies of 9.0, 12.0, 21.0, 25.0, 30.0, 35.0, 40.0, 45.0, 48.4 and 65.0 MeV, and elastic scattering angular distributions in the Rutherford ratio at the incident proton energies of 10.75, 14.15, 15.61, 22.85, 49.35 and 65.0 MeV are in good agreement with experimental data [47,50,58,62–65] for p + 44Ca reaction as shown in Figs. 11 and 12. The calculated results of elastic scattering angular distributions at the incident proton energies of 9.0, 12.0, 21.0, 25.0, 30.0, 35.0, 40.0, 45.0, 48.4 and 201.4 MeV, and elastic scattering angular distributions in the Rutherford ratio at the incident proton energies of 14.03, 15.05, 15.63 and 65 MeV are in agreement with experimental data [47,60,62,65,66] for p + 48Ca reaction as shown in Figs. 13 and 14.
Global dispersive optical model potential for proton as projectile in the energy region up to 200 MeV
2008, Nuclear Physics A
Reduced electric-octupole transition probabilities, B(E3;0<inf>1</inf>+ → 3<inf>1</inf>-) - An update
2002, Atomic Data and Nuclear Data Tables
A previous compilation of excitation energies E_x (3₁⁻) and reduced electric-octupole transition probabilities B(E3;0₁⁺→3₁⁻) for first 3⁻ states of even-even nuclides, which covered the literature to March 1988, has been updated to cover the literature to the end of 2000. Data obtained from various experimental procedures are tabulated. The final table presents adopted values of B(E3;0₁⁺→3₁⁻), together with the E3 transition strengths |M(E3)|² in Weisskopf units. Plots of |M(E3)|² versus mass number A, atomic number Z, and neutron number N confirm the existence of structure suggested in the earlier work.

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^☆: Research supported in part by the U.S. Atomic Energy Commission.

^††: National defense m Educationa Act Fellow.

^†††: Presently on leave at: Natuuurkunding Laboratorium der Vrije Universiteit, Amsterdam, Nederland.

^‡: Permanent address: De Paul University, Department of Physics, Chicago, Illinois.

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Nuclear Physics A

Abstract

References (39)

Nucl. Phys.

Nucl. Phys.

Nucl. Phys.

Nucl. Instr.

Phys. Lett.

Nucl. Phys.

Nucl. Phys.

Nucl. Phys.

Nucl. Phys.

Phys. Lett.

Nucl. Phys.

Nucl. Data

Nucl. Phys.

Phys. Rev.

Phys. Rev.

Phys. Rev.

Nucl. Phys.

Cited by (24)

Nuclear Structure and Decay Data for A=44 Isobars

Nuclear Data Sheets for A = 42

Nuclear Data Sheets for A = 44

Calculation and analysis of p + <sup>40,42,43,44,46,48,nat</sup>Ca reaction cross sections at incident energies from threshold to 250 MeV

Global dispersive optical model potential for proton as projectile in the energy region up to 200 MeV

Reduced electric-octupole transition probabilities, B(E3;0<inf>1</inf><sup>+</sup> → 3<inf>1</inf><sup>-</sup>) - An update

Inelastic proton scattering from 42Ca and 44Ca and analysis in terms of shell-model form factors☆

Abstract

Nucl. Phys.

Nucl. Phys.

Nucl. Phys.

Nucl. Instr.

Phys. Lett.

Nucl. Phys.

Nucl. Phys.

Nucl. Phys.

Nucl. Phys.

Phys. Lett.

Nucl. Phys.

Nucl. Data

Nucl. Phys.

Phys. Rev.

Phys. Rev.

Phys. Rev.

Nucl. Phys.

Inelastic proton scattering from ⁴²Ca and ⁴⁴Ca and analysis in terms of shell-model form factors☆